Chair.



UNrrn STATES .FATENT FFICE.

ERNEST E. KOKEN, OF ST. LOUIS, MISSOURI.

CHAIR.

sPEcmIoA-TIoNrormin part 'of Letters Patent No. 660,905, dated Octoberso, 1900.

Original application filed March 10, 1898, serial No. 673 ,310. Dividedand this application filed October 26, 1899. Serial Ila-734,796.tllomodel.)

T0 aZZ whom it may concern:

Be it known that I, ERNEST E. KoKEN, a citizen of the United States,residing in the city of St. Louis, State of Missouri, have inventedcertain new and useful Improvements in Chairs, of which the following isa full, clear, and exact specification.

My invention relates chiefly to revolving and reclining chairs havingadjustable footrests, and is particularly useful in connection with whatare known as barbers chairs, this application being a continuation ofone filed by me on March 10, 1898, Serial No. 673,310, for the sameinvention. 4

The chief objects of my improvements are, first, to provide an improvedchair-seat lock; second, to provide an improved foot-rest lock, and,third, to so'combine said looks with a single lever as to enable anoperator to control both locks by means of such lever. I attain theseand other minor objects by means of mechanism whose preferred form isillustrated in the accompanying drawings, in which- Figure 1 is a sideelevation, on a reduced scale, of a chair embodying my improvements.Fig. 2 is a side elevation of the portions of the mechanism to which myinvention more particularly relates with parts thereof broken away. Fig.3 is a front ele vation of the parts illustrated in Fig. 2.: Fig. 4 is arear elevation of the same parts. Fig. 5 is a detailed view, on anenlarged scale, of a vertical transverse section on line 5 5, Figs. 3and 7. Fig. 6 isa horizontal section on the same scale on line 6. 6,Figs. 2 and 5. Fig. 7 is a vertical section on line 7 7, Figs. 2 and 5,with the cam-shaft shown in the other views removed. Fig. 8 is ahorizontalse'ction on line 8 8, Figs. 2 and 5, with the footrest lockand the springand washer shown on the cam-shaft in other views removed.Fig. 9 is a detailed plan view of a pair of segments forming parts ofthe chairs seatlock, and Fig. 10 is a detailed side elevation of thefoot-rest lock.

Similar letters refer to similar parts throughout the several views. I

The chair A, Fig. 1, used to illustrate my improvement is a barberschair of common form. Its base B, seat 0, back D, arms E,

entering said space and foot-rest F are old and well known. The back isshown pivoted at its lower end (1 to the seat-frame. The foot-rest ispivoted at f to the same frame by means of the arms G, and the arms Econnect the back D and foot-rest arms G, so that when the back islowered the foot-rest is elevated and when. the back is raised thefoot-rest is lowered.

To the botlomof the seat-frame a spindle H is attached, which in theform shown has an enlarged upper end H and journals hand 72., the lattercontaining an annular groove h The chair-seat and all parts attachedthereto are supported upon said base B,- Figs. 1 and 2, which preferablyhas a hub b, with a vertical opening 1) extending through itand legs 17attached to and supporting the hub. Tothe top of said hub a cap-piece I,Figs l, 2, 3, 4, 5, 7, and 8, is attached, having an annular flange orcollar 01 projecting upward therefrom along its outer edge and a centralboss t" projecting downinto the opening I) in journal h of said spindleH, and to the lower end of said hub I preferably attach a plate J,

Figs. 2, 3, and 4., provided with-a cientraldowm' weirdly-extending bossj, containing a bearingjfo r the journal 72. of said spindle andpreferably pierced by a screw-holefi, containing a set-screwj whoseinnerend enters the annular groove h in said bearing h when the parts of thechair are all in place and pre-' vents said spindle from rising. -Hrotates in said bearings t and j, and its weight and that of thechair-seat and at- .tached mechanism are preferably supported. bythee-ap-piece I, upon which the base h of the enlarged portion Hjof thespindle H rests.

The spindle The lower portion of the enlarged upper end of the spindle H'rotatesin the space inclosed by the flange 2' of the cap-piece Landbetween it and the said flange a pair'of segmentsK- are arranged, Figs.5, 7, 8, ands, each preferably provided with an enlargement is at oneend, said enlarged ends extending toward.

each other. Between the small ends of said segments there is space for aboss H projecting out horizontally from said upper end of the spindle H,Figs. 2, 3, 5, and 8, and

There is also preferably a space between said enlarged ends of i saidsegments K, and the tips of said enlarged ends are preferably beveled,as shown in Figs. 8 and 9, so as to leave a space between them,enlarging toward said spindle and adapted to receive the wedge-shapedhead Zof a bolt L, Figs. 5, 8, and 9. The inner end of said bolt Lreciprocates in a recess 71 in the upper end of said spindle and isnormally forced outward, so as to cause the end of its wedge-shaped headZ to enter the space between said enlarged ends it of the segments K andforce them apart and lock the chairseat in position by apartially-compressed coiled spring Z arranged in a recess 71. in theboss H of said spindle, Fig. 5. Said bolt is shown provided with anupwardly-projecting lug Z and is preferably retracted by means of adownwardly-projecting cam m on a shaft M, Figs. 2, 3, 4, 8, and 10. Saidshaft is journaled in bearings m' and m in the upper end H of saidspindle,th rough which it passes and is operated by means of a lever M,Fig. 1. Said shaft is shown provided at its inner end with a pin m andwasher m and has arranged thereon between said washer and the spindle Ha partially-extended coiled spring 171 which normally tends to draw saidshaft inward. The inward passage of the shaft is preferably limited byan enlargement M Figs. 1, 2, 3, 4, (i, and 8, which is shown providedwith horizontal arms m and m and an upwardly-projecting arm m having aninwardly-projecting tooth m. When said shaft is rocked, its rotarymovement is limited by a stop m (see Fig. 7,) projecting out from thespindle H and extending beneath the arms on and m When the lever M ofsaid shaft is in an upright vertical position, the working face of cammof said shaft M is disengaged, and when said position is reachedv bysaid lever said tooth m on the arm m comes opposite a recess m, Figs. 6and 8, in theside of the spindle H and is drawn into it by the spring Mand retained untilforcibly removed by pressure upon said lever.

To the underside of the footrest F a bracket N, Fig. 1, is secured, towhich a lock-bar N, provided with stops n and n, is pivotally'attachedat n and the foot-rest F is secured in position by mechanism forgripping said lock-bar N. The foot-rest lock is preferably arranged inan opening or passage h, Figs. 5, 6, 7, and 8, extending through thespindle H from front to rear, and said lock is preferably supported byand rocks upon the camsha-ft M and preferably consists of a frame 0, ajaw O, and means for forcing the jaw into contact with the bar N, Figs.1, 2, 3, 4, 5, 6, 7, and 10.

The frame 0 preferably has a base 0, contaiuinga slot 0 and a transverseopening 0 through which last the cam-shaft M extends, and which openingis large enough on one side to permit the cam m to enter said slot 0. It

Both arms are pierced by a longitudinal opening 0 through which the barN passes and in which it reciprocates. The arm 0 is provided at itsupper end with a pairof vertical lugs 0, between which the rear end ofthe jaw O is secured to said frame by a pivot 0 and the arm 0 is shownprovided with a pair of opposite laterally-extending lugs 0 from each ofwhich a bolt 0 having a head 0 extends upward. The jaw O has a base 0which is preferably provided on its under side with a tooth 0, adaptedto grip the top of the lock-bar N, and a lug 0 The lug O preferably/hasan enlargement 0 pierced by an opening 0 through which said bar Nextends and which is preferably large enough to allow said bar some playtherein, and a rearwardly-projecting tip 0 adapted to be engaged by thecam m on the shaft M. The outerend of said base is shown provided with apair of opposite laterally-extending lugs 0 through which the bolts 0extend and which are preferably large enough to allow said bolts someplay. Between the tops of said lugs 0 and the heads 0 thereof washers 0and coiled springs 0 are arranged on said bolts, and said springs arepartially compressed and normally force the tooth 0 of the jaw 0 downagainst said bar N with suliicient force to prevent said bar fromreciproeating, and in that way they keep said footrest F locked inposition, as will be seen most clearly in Fig. 5. The shaft M passesbetween the tip 0 of the lug O and the lug l of the bolt L.

When the enlarged ends it of the segments K are forced apart by theaction of the spring 1' in pressing the head Z in between them, saidsegments are not only forced against the inner side of the annularflange 1' of the cap I, Fig. 8, but their opposite ends are caused togrip the boss H of the spindle H, and in that way the chair-seat is heldvery rigidly in position. By moving the lever M back from its verticalposition the cam m of the shaft M may be brought into contact with thelugl of said bolt L, and said bolt may thereby be pressed back againstthe pressure of the spring Z until the segments K are loosened. Thechair-seat may then be revolved freely. By moving said lever M forwardfrom its vertical position the cam m may be forced into contact with thetip 0 of the lug 0 and the jaw 0 opened far enough to remove thepressure of the tooth 0 from the bar N, so as to loosen said bar andenable the foot-rest to be adjusted. After either the chair-seat or thefoot-rest has been adjusted the lever M is preferably returned to itsvertical position, and the fact that it has reached that position iscalled to the operators attention by the tooth m entering its recess m,due to the force exerted by the spring m or other elastic means. Whenthe lever M is brought back to its vertical position, the lock which hasbeen opened thereby closes automatically, due to the force exerted bythe spring Z or other elastic means, and as long as said tooth isengaged by said recess the lever M is retained in its vertical positionand is keptout of engagementwith the locking mechanism.

.1 have described the special form of mydevice, but do not desire tohave my claims limited thereto.

What I claim is 1. In a foot-rest lock, the combination with areciprocating bar, of two coacting locking members having unopposingportions engaging the bar, one of said members being movable withrelation to the other, said bar being disposed between said members, andmeans for operating said movable member to release the bar,substantially as described.

2. In a foot-rest lock, the combination with a reciprocating bar, of twolocking members, between which said bar extends, one of said membersformed with projections engaging said bar, and the other member with aprojection engaging said bar at a point between the engaging projectionsof the first-mentioned member, and one of said members being movablewith relation to the other and spring-held, and means for operating saidmovable member to release said bar, substantially as described.

3. In a foot-rest lock, the combination with a reciprocating bar, of arelatively-fixed looking member supporting said bar, a pivotedspring-held locking member, said members having unopposing engagingportions engaging and clamping the bar, and means for operating thepivoted member to release the bar, substantially as described.

4. In a foot-rest lock, the combination with a movable'and arelatively-fixed locking mem ber, of a reciprocating bar disposedtherebetween and clamped thereby, elastic means for holding the movablemember normallyin contact with said bar, said movable member formed witha laterallyextending projection, and a rock-shaft mounted adjacent tosaid projection and having a cam engaging the same and operating themovable member to release the bar when the shaft is rocked,substantially'as described.

5. The combination in a revolving chair of a base; a chair-seat; aspindle attached to said seat and rotating in and supported by saidbase; a recess in said spindle; a bolt whose rear end extends into saidrecess and whose other end projects therefrom; a spring in said recesstending to force said bolt into its outermost position; a collar, and apart within said collar which said bolt, when in its normal position,wedges against said collar, thereby locking the chair-seat; and meansfor operating the bolt to release the parts from their locking position.

6. The combination in a revolving chair of a seat; a spindle supportingthe seat and hav inga laterally-projecting boss; a base in which saidspindle rotates and by which it is supported; a collar attached to'saidbase; a segment arranged Within said collar; and means within saidsegment for locking said chairseat by forcing one end of the segmentagainst said boss'and its outer side against the inside of said collar.

7. The combination in a revolving chair of a base having a collar attached thereto; a pair of segments within said collar placed'oppositeeach other; a chair-seat; a spindle attached to said seat and rotatingin and supported by the base and having a laterally-extending bossprojecting between the ends of said segments; a bolt within said collar;means for forcing the head of said bolt between the ends of saidsegments opposite those next said boss and holding it there, andmechanism for retracting said bolt.

8. The combination in a revolving and reclining chair of a seat;afootrest; means pivotally connecting the rest and seat; a lockingbar;means connecting the bar and foot-rest; a spindle having in its upperend an opening through it from front to rear; a recess for a bolt andtransverse bearings for a shaft; a cam-shaft rocking in said bearings; abolt whose rear end reciprocates in said recess and which is providedwith a lug projecting into the path of the cam on said shaft; a springtending to force said bolt into its outermost position; a foot-rest lockhaving a frame with openings through which said locking-bar and saidcam-shaft pass; a jaw having a lug projecting into the path of the camon said shaft opposite the lug on said bolt; a part for gripping saidbar; means pivotally connecting said jaw and frame; and meanselastically pressing said gripping portion of said jaw into contact withsaid bar, substantially as I described.

9. The combination in a revolving and rean arm projecting from saidshaft having an inwardly-projecting tooth; a recess in the spindle forsaid tooth; elastic means for forcing said tooth into saidrecess whenthe cam on said shaft reaches an inoperative position; a lock for saidfoot-rest bar opened by turning said lever in one direction from theposi tion in which it stands when said tooth is in its recess, and achair-seat lock released by turning said lever in the oppositedireotion,means by which the movementof said lever in one direction from itsinoperative position releases the chair-seat lock, and means whereby itsmovement in the opposite direction releases the foot-restlock,substantially as described.

10. The combination in a foot-rest look; a I

frame 0 having a base 0 containing a ver'ti cal slot 0 and a transverseopening 0 and having also arms 0 and 0 pierced by a longitudinal opening0 a jaw 0 having a base 0 provided with a'tooth 0 and a lug 0 meanspivotally connecting the end of the base of said jaw next said tooth 0to said frame; a looking-bar projecting through the opening 0 inposition to be engaged by said tooth; means elastically pressing saidtooth into engagement, and acam-shaft extending through said opening 0and with its claim in position to open said jaw by pressing against saidlug, substantially as described.

11. The combination in a revolving and recliningchairofaspindlesupporting the chairseat; a base supporting the chair-seat; a basesupporting the spindle; mechanism for looking the chair-seat; mechanismfor locking the foot-rest; a bearing in said spindle; a camshaftjournaled in the bearing for opening said looks; a pair of arms m and mprojecting from opposite sides of the shaft and a stop on projectingfrom the spindle.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ERNEST E. KOKEN.

Witnesses:

HUGH K. WAGNER, JAMES H. BRYSON.

